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Finding the Fourth Proportional to 452.89, 679.29 and 128.23

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Solution

The fourth proportional to 452.89, 679.29 and 128.23 is: 192.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.89 : 679.29 = 128.23 : x
  2. Step 2: Convert to fraction form
    452.89/679.29 = 128.23/x
  3. Step 3: Cross multiply
    452.89x = 679.29 × 128.23
  4. Step 4: Simplify right side
    452.89x = 87,107.00
  5. Step 5: Solve for x
    x = 87,107.00/452.89
  6. Step 6: Final answer
    x = 192.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.